Adjustable chair-desk



J; F. TRIMBLE.

ADJUSTABLE CHAIR DESK.

(No Model.)

Patented Ja n.=12, 1897.

JOSEPH 71 2mm E,

INVENTOR.

A TRNEYJ .inafter set forth.

UNITED STATES ATENT UFFICE.

J OSEPI-IF. TRIMBLE OF HAMMOND, GEORGIA.

ADJUSTABLE CHAIR-DES K.

$1 EGIFICATION forming part of Letters Patent No. 575,288, dated January12, 1897.

Application filed February 28, 1896. Serial No, 581,225. (No model.)

To aZZ whom it may concern:

Be it known that I, JOSEPH F. TBIMBLE, a citizen of the United States,residing at Hammond, in the county of Fulton and State of Georgia, haveinvented a new and useful Students Desk, of which the following is aspecification.

This invention relates to devices whereby a lap-board or table forwriting and other purposes may be attached to a chair in such a manneras to be adjustable to and from the user and vertically as to height andwhich will, when dismounted, be as compact as possible.

The invention consists of the device here- In the accompanying drawings,Figure 1 is a perspective View showing the device in position for use.Fig. 2 is a profile plan thereof. Fig. 3 is a side elevation showingsame dismounted and by broken lines showing the mounted position. Fig.4;is a sectional View of the bracket on each end of the securingbar. Fig.5 is an inverted plan view of the board, showing the straining-cleatsthereunder.

In the figures like reference-characters are uniformly employed in thedesignation of corresponding elements of construction.

In the drawingsis shown a chair of ordinary construction, typifyin g achair or bench having uprights on its back side capable of receivingthis device.

a is the bar, which is preferably ofcast metal and has drilled thereinnear each end a series of holes,through which pass the hoolibolt b,which has a fly-nut on its outer end, its inner end being curved to fitthe upright of the chair. On the ends of this bar a are sidewiseextensions, a plate of correlative size being supported parallel to sameand being secured thereto by short cross-bars, as best shown in sectionin Fig. 4, said eross-bars being respectively at the upper back andlower front corners of the said plate and sidewise extensions of the bara.

This sidewise extension and plate, with its cross-bars, will behereinafter denominated a bracket.

0 are bars, preferably of wood, which lie with one of their ends betweenthe plates and sidewise extensions. These bars serve when elevated tosupport the board or table so, their back ends resting, respectively,under the cross-bar between the upper back corners of the bracket andover the other one of said cross-bars, whereby the said bars areprojected and held in substantially a horizontal position. Whendismounted,said bars chang, as best shown in Fig. 1, pendent from thebracket, pins in the front ends of said bars preventing them fromdropping. On the under side of the board so are straining-cleats e,which are divergent backwardly, so that when the said board so is placedupon the upper sides of the bars 0 said bolt may be pulled baekwardly,and said cleats 6 will press upon the outer sides thereof and cramp themin the brackets, as well as cause a frictional contact between the boardand said bars which will not be easily disrupted. This makes the devicerigid when mounted.

cl d are brackets, between which and the legs rest the lower edge of thetable a: when p the same is dismounted.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

In a chair-desk, a bar adapted to be secured to the back of a chair, twoparallel plates on each end thereof having connecting-bars be tweentheir contiguous faces at the upper back and lower front corners, barsadapted to have their .back ends inserted between. said plates and restrespectively under and over said con meeting-bars and a table adapted tobe seated on the free ends of said bars, substantially as and for thepurpose specified.

February 5, 1896.

J. F. TRIMBLE. Witnesses:

M. F. RAMSEY, GEO. O. TRIMBLE.

